"I could not be more disgusted, enraged, terrified, by and generally totally disappointed with the city of Chicago," William Vassilakis, who leases the apartment that police entered Wednesday, told ABC.

Zoe Sigman, an activist who lives in the building, denied that anything illegal was going on in the apartment where out-of-town anti-NATO protesters had been staying for the previous two weeks, the Tribune reports.

An anti-NATO protestor flashes peace signs during a march, Saturday, May 19, 2012, in Chicago. On Sunday, the start of the two-day NATO summit, thousands of protesters are expected to march to the McCormick Place convention center, where NATO delegates will be meeting. (AP Photo/John Minchillo)